package com.vf.web.controller.common;

import com.aliyun.oss.model.VoidResult;
import com.vf.common.annotation.Anonymous;
import com.vf.common.config.RuoYiConfig;
import com.vf.common.constant.Constants;
import com.vf.common.core.domain.AjaxResult;
import com.vf.common.oss.OssClient;
import com.vf.common.properties.AliyunOssProperties;
import com.vf.common.utils.ServletUtils;
import com.vf.common.utils.StringUtils;
import com.vf.common.utils.file.FileUtils;
import com.vf.framework.config.ServerConfig;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.validation.Valid;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotNull;
import java.util.ArrayList;
import java.util.List;

/**
 * 通用请求处理
 * 
 * @author ruoyi
 */
@RestController
@RequestMapping("/common")
@Api( tags = "通用接口")
public class CommonController
{
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    @Autowired
    private OssClient ossClient;

    private static final String FILE_DELIMETER = ",";

    /**
     * 通用下载请求
     * 
     * @param fileName 文件名称
     * @param delete 是否删除
     */
    @GetMapping("/download")
    @ApiOperation(value = "通用下载请求")
    @Anonymous
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request)
    {
        try
        {
            if (!FileUtils.checkAllowDownload(fileName))
            {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = RuoYiConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete)
            {
                FileUtils.deleteFile(filePath);
            }
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    @ApiOperation(value = "通用上传请求（单个）")
    @Anonymous
    public AjaxResult uploadFile(@RequestPart("file") @Valid @NotNull @NotBlank MultipartFile file) throws Exception
    {
        try
        {
//             上传文件路径
//            String filePath = RuoYiConfig.getUploadPath();
//            // 上传并返回新文件名称
//            String fileName = FileUploadUtils.upload(filePath, file);
//            String url = serverConfig.getUrl() + fileName;
            AliyunOssProperties properties = ossClient.getAliyunOssProperties();
            String url = properties.getUrl();
            String dirName = ServletUtils.getRequest().getHeader("dirName");
            String newFileName = FileUtils.generateSafeFileName(file.getOriginalFilename());
            dirName = dirName == null ? "upload" : dirName;
            String objectName = "backend/" + dirName + "/" + newFileName;
            log.info("objectName: {}",objectName);
            ossClient.upload(objectName, file.getInputStream());
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", url + objectName);
            ajax.put("fileName", FileUtils.getNameNotSuffix(file.getOriginalFilename()));
            ajax.put("newFileName", newFileName);
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    @ApiOperation(value = "通用上传请求（多个）")
    @Anonymous
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception
    {
        try
        {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            AliyunOssProperties properties = ossClient.getAliyunOssProperties();
            String url = properties.getUrl();
            String dirName = ServletUtils.getRequest().getHeader("dirName");
            dirName = dirName == null ? "upload" : dirName;
            for (MultipartFile file : files)
            {
                // 上传并返回新文件名称
                String newFileName = FileUtils.generateSafeFileName(file.getOriginalFilename());
                String objectName = "backend/" + dirName + "/" + newFileName;
                ossClient.upload(objectName, file.getInputStream());
                urls.add(url + objectName);
                fileNames.add(FileUtils.getNameNotSuffix(file.getOriginalFilename()));
                newFileNames.add(newFileName);
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    @ApiOperation(value = "本地资源通用下载")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception
    {
        try
        {
            if (!FileUtils.checkAllowDownload(resource))
            {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }

    @DeleteMapping("/delete")
    @ApiOperation(value = "删除文件")
    public AjaxResult deleteFile(String objectName){
        VoidResult result = ossClient.delete(objectName);
        return AjaxResult.success("删除成功");
    }
}
